The next Foo Fighters album will have a little bit of Philly flavor, courtesy of Boyz II Men singer Shawn Stockman.

Foo Fighters members Dave Grohl and Taylor Hawkins recently revealed Stockman's appearance in a spot on BBC 6 Radio where the pair discussed the Foo Fighters' upcoming album, Concrete and Gold. As Grohl said on the program, "the guy from Boyz II Men" guests on the album's "heaviest song" — a performance that happened only after Grohl ran into Stockman in a parking lot near an unidentified recording store

"It sounds like Sabbath and Pink Floyd," Grohl said. "It's the last song on the record. He built a choir — it's like 40 vocals stacked. It's insane. It's amazing."

Stockman, 44, is a founding member of Boyz II Men, and serves as one of the group two tenor singers alongside Wanya Morris. The group started out as Unique Action while its members were students at the Philadelphia High School for the Creative and Performing Arts in South Philly. The city renamed a portion of Broad Street near CAPA "Boyz II Men Boulevard" last month.

As Spin points out, Stockman likely appears on the album's title track, according to a previously-released tracklist for the album.

Concrete and Gold is currently scheduled for a Sept. 15 release. Check out Grohl and Hawkins' interview below: